The OPC
Tunneler uses Client/Server architecture to transfer data over an Intranet,
Internet or WAN. It also creates a secure OPC Tunnel through firewalls and
complements existing OPC DA applications. The OPC Tunnel provides end-users,
integrators and automation suppliers with a favorable solution for remote
connectivity to OPC applications. In comparison to remote OPC Connectivity via DCOM, the
OPC Tunneler boasts security, ease of use and maintainability. Furthermore,
there is no need to expose applications to unauthorized or anonymous users since
OPC UA does not require a VPN connection for
security.